Programmable logic array arrangement

摘要

The programmable logic array arrangement comprises a plurality of cell units formed on a semiconductor substrate and wiring means for interconnecting the cell units. Each cell unit comprises a plurality of electronic elements such as resistors, transistors and diodes which are necessary to form logic circuits, and the wiring means comprises a plurality of bit lines and product term lines which are arranged in the form of a matrix, conductive layers for determining the type and input/output conditions of the logic circuit to be formed. The array arrangement further comprises a group of switching elements connected between the electronic element, bit lines, product term lines, and conductive layers for interconnecting or disconnecting these elements thereby forming desired logic circuits.